Daniel St. Hubert, arrested in the stabbing death of a Brooklyn boy, is now being looked at as a possible suspect in an attack on a Chelsea subway platform, police said.Credit: NYPD

The man arrested in the stabbing death of a 6-year-old boy in Brooklyn is now being looked at as a possible suspect in another stabbing Wednesday on a Chelsea subway platform, police said.

A 53-year-old man was stabbed several times on the southbound 1 train platform at West 18th Street and Seventh Avenue around 5:30 a.m., according to the NYPD. He was taken to Bellevue Hospital in stable condition and no weapon was recovered.

Daniel St. Hubert, 27, arrested Wednesday night for the fatal stabbing of Prince Joshua Avitto, is now being questioned for the subway assault, a law enforcement official said.

St. Hubert was also wanted for critically wounding 7-year-old Mikayla Capers, who was going to get ice cream with Prince when they were attacked at the Boulevard Houses in East New York on Sunday, police said.

Police linked St. Hubert to the attack after DNA was discovered on a knife recovered from the scene of the stabbing. He was arrested around 8 p.m. Wednesday in South Ozone Park.

St. Hubert has nine prior arrests and was released on May 23 after serving a full sentence for domestic assault, officials said. He is said to have a a history of violent behavior, having attacked police and corrections officers.

Officials said St. Hubert is still being eyed in the May 30 stabbing of 18-year-old Tanaya Copeland. The Long Island University student was killed just a few blocks from the Boulevard Houses stabbing, police said.